Raman spectra and Seebeck coefficient of Cu2ZnSnS4 nanocrystals/PEDOT:PSS composite films

IF 2 4区材料科学 Q3 MATERIALS SCIENCE, COATINGS & FILMS

Thin Solid Films Pub Date : 2025-02-11 DOI:10.1016/j.tsf.2025.140618

Yevhenii Havryliuk , Volodymyr Dzhagan , Oleksandra Ivakhno-Tsehelnyk , Anatolii Karnaukhov , Julia Hann , Oleksandr Selyshchev , Dietrich R.T. Zahn

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引用次数: 0

Abstract

Cu₂ZnSnS₄ (CZTS), especially in the form of nanocrystals (NCs), is very promising as absorber material for thin-film solar cells. Recent studies on CZTS showed thermoelectric (TE) properties as well, making this material attractive for hybrid energy harvesting applications. Here, we investigate composites of CZTS NCs with poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), a widely used conductive polymer with TE properties, which potentially may help to improve the inherently low electrical conductivity of NC films. We focus on the investigation of the Seebeck coefficient of pure PEDOT:PSS and CZTS NCs/PEDOT:PSS composites subject to thermal or flash lamp annealing (FLA). The surface morphology of the obtained films was studied using atomic force microscopy, while structural changes in both the CZTS NCs and the polymer were monitored simultaneously using Raman spectroscopy. For both FLA and thermal annealing, the composite films show improved Seebeck coefficients (20–200 μV/K) compared to pure PEDOT:PSS films (10–18 μV/K) or NCs films (10–30 μV/K).

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来源期刊

Thin Solid Films 工程技术-材料科学：膜

CiteScore

4.00

自引率

4.80%

发文量

381

审稿时长

7.5 months

期刊介绍： Thin Solid Films is an international journal which serves scientists and engineers working in the fields of thin-film synthesis, characterization, and applications. The field of thin films, which can be defined as the confluence of materials science, surface science, and applied physics, has become an identifiable unified discipline of scientific endeavor.